python错误之RuntimeError: dictionary changed size during iteration
pythonn报错信息:
C:\Users\Administrator\AppData\Local\Programs\Python\Python36-32\python.exe C:/Users/Administrator/PycharmProjects/pythondemo/maptest.py
Traceback (most recent call last):
File "C:/Users/Administrator/PycharmProjects/pythondemo/maptest.py", line 5, in <module>
for line in maps.keys():
RuntimeError: dictionary changed size during iteration
python2中实现遍历的同时删除字典中的元素;python3中运行报错信息:
C:\Users\Administrator\AppData\Local\Programs\Python\Python36-32\python.exe C:/Users/Administrator/PycharmProjects/pythondemo/maptest.py Traceback (most recent call last): File "C:/Users/Administrator/PycharmProjects/pythondemo/maptest.py", line 5, in <module> for line in maps.keys(): RuntimeError: dictionary changed size during iteration
# maps = {1:"李明",2:"丹尼"} # for line in maps.keys(): # if(line == 2): # maps.pop(line) # print(maps)
python3中实现遍历的同时删除字典中的元素
maps = {1:"李明",2:"丹尼"} for line in list(maps.keys()): if(line == 2): maps.pop(line) print(maps)